A typical loser who sits in front of their computer all day talking about different martial arts techniques and styles and how one style is better than another and how one technique can defeat another technique.
Often they lack any real martial arts experience since the only martial arts training they have had was from watching Chuck Norris, Bruce Lee or Steven Seagal films and/or reading Martial Arts manuals.
They have often only trained a few months in a martial art, if at all, and rely on stories that they had heard as case studies to prove that the style they had trained in is better than the other.
Armchair Samurai 1: You know all you really need to defeat a guy who's trying to do a takedown is to use dim mak. It'll stop his heart. I mean that's what my uncle's cousin's room mate did... and he read Bruce Lee's book so it's supposed to work.